Sonoran Desert National Monument is south of Goodyear and Buckeye and east of Gila Bend, Arizona. Created by Presidential proclamation on January 17, 2001, the 496,400 acres (200,886 ha) monument is managed by the U.S. Bureau of Land Management as part of the National Landscape Conservation System. The BLM already managed the lands, however under monument status, the level of protection and preservation of resources is enhanced. Sonoran Desert National Monument protects but a small portion of the Sonoran Desert, which is 120,000 square miles (311,000 km2), and extends well into California and the country of Mexico. The North Maricopa Mountains, South Maricopa Mountains and the Table Top Wildernesses protect the richest regions of desert habitat from development.